This title appears in the Scientific Report :
2019
Please use the identifier:
http://dx.doi.org/10.1016/j.jeurceramsoc.2019.06.045 in citations.
Please use the identifier: http://hdl.handle.net/2128/22735 in citations.
Thermochemical stability of Fe- and Co-functionalized perovskite-type SrTiO3 oxygen transport membrane materials in syngas conditions
Thermochemical stability of Fe- and Co-functionalized perovskite-type SrTiO3 oxygen transport membrane materials in syngas conditions
The materials typically used for oxygen transport membranes, Ba0.5Sr0.5Co0.8Fe0.2O3−δ (BSCF) and La0.6Sr0.4Co0.2Fe0.8O3 (LSCF) tend to decompose due to their low thermochemical stability under reducing atmosphere. Fe- and Co-doped SrTiO3 (SrTi1-x-yCoxFeyO3-δ, x + y ≤ 0.35) (STCF) materials showing a...
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Personal Name(s): | Liu, Yang |
---|---|
Motalov, Vladimir / Baumann, Stefan (Corresponding author) / Sergeev, Dmitry / Müller, Michael / Sohn, Yoo Jung / Guillon, Olivier | |
Contributing Institute: |
Werkstoffstruktur und -eigenschaften; IEK-2 JARA-ENERGY; JARA-ENERGY Werkstoffsynthese und Herstellungsverfahren; IEK-1 |
Published in: | Journal of the European Ceramic Society, 39 (2019) 15, S. 4874 - 4881 |
Imprint: |
Amsterdam [u.a.]
Elsevier Science
2019
|
DOI: |
10.1016/j.jeurceramsoc.2019.06.045 |
Document Type: |
Journal Article |
Research Program: |
Methods and Concepts for Material Development |
Link: |
Published on 2019-06-25. Available in OpenAccess from 2021-06-25. Published on 2019-06-25. Available in OpenAccess from 2021-06-25. |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/22735 in citations.
The materials typically used for oxygen transport membranes, Ba0.5Sr0.5Co0.8Fe0.2O3−δ (BSCF) and La0.6Sr0.4Co0.2Fe0.8O3 (LSCF) tend to decompose due to their low thermochemical stability under reducing atmosphere. Fe- and Co-doped SrTiO3 (SrTi1-x-yCoxFeyO3-δ, x + y ≤ 0.35) (STCF) materials showing an oxygen transport comparable to LSCF have great potential for application in ion-transport-devices. In this study, the thermochemical stability of pure perovskite-structured STCF was investigated after annealing in a syngas atmosphere at 600–900 °C. The phase composition of the materials after annealing was characterized by means of X-ray diffraction (XRD). The thermodynamic activities of SrO, FeO, and CoO in the STCF materials were evaluated using Knudsen effusion mass spectrometry (KEMS). Co-doped SrTiO3 (STC) materials were not stable after annealing in the syngas atmosphere above 5 mol% Co-substitution. Ruddlesden-Popper-like phases and SrCO3 were detected after annealing at 600 °C. In contrast, Fe substitution (STF) showed good stability after annealing in syngas upto 35 mol% substitution. |